A compressible sealing piece or a threading piece used for cables, wire rods or pipelines is provided with two or a plurality of compressible base parts surrounding the cables, the wire rods or the pipelines. The sealing piece or the threading piece is directly arranged on an opening of other structural distance piece, which passes through walls or forms the walls or other distance piece, or arranged in a frame. The distance piece is formed two or a plurality of base parts, or at least one compressed unit in the opening or the frame. Each compressible base part is provided with at least one peelable layer which is used for matching with the diameter of the cables, the wire rods or the pipelines, and at least one peelable layer is arranged in an axial groove of each compressible base part. In some enforcement modes, at least one peelable layer is arranged around each compressible base part, and at least one peelable layer is used for matching the external diameter of the compressible base part with internal diameter of the opening. Adjacent peelable layers can be attached to each other through a mechanical fastener, thus eliminated layers are allowed to be repositioned.